Alluvial fans

Death Valley, California > the textbook arid fan
Taklamakan desert, China > a giant arid fan
Koshi River, India > a giant temperate fan

Meandering rivers

Yukon River, Alaska > an Arctic river and delta system
Mississippi River, Mississippi > the archetypal meandering river
Purus River, Brasil > mostly unaffected by man

Braided rivers

Brahmaputra River, India > a giant, flood-prone river system
Sheep River, Alberta > a small glacial river
Yukon Flats, Alaska > a large glacial river

Aeolian dunes

White Sands, New Mexico > gypsum dunes, two varieties
Saudi Arabia > star dunes
Namibia > giant dunes, two varieties

Carbonates

Joulter's Cay, Bahamas > ooid shoals
Maldives > atolls